The VSTLT-K / VHTLT-K from WORK Microwave is a Test Loop Translator with Downlink Frequency 11.7 to 12.5 GHz, Uplink Frequency 17.3 to 18.4 GHz, LO Frequency 4.8 / 6.65 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for VSTLT-K / VHTLT-K can be seen below.